(a) Arrangement. The arrangement, character, extent, width and location of all streets shall conform to the locally adopted Land Use and Thoroughfare Plan. The design of proposed streets shall provide for both the continuation of existing streets and access to adjacent unplatted lands so that the entire area can be served with a coordinated street system.
(b) Street Classifications.
(1) Major arterial thoroughfares shall be planned for continuation of movement of fast traffic between points of heavy traffic generation and from one section of the community to another. They shall contain as few intersections with minor streets as possible. Such thoroughfares should traverse the community and should be spaced approximately one mile apart.
(2) Collector streets shall provide a traffic route from local streets to major arterial thoroughfares. These streets should be spaced at least one-fourth mile apart.
(3) Local streets shall provide direct and full access to each lot and shall be laid out so that their use by through traffic shall be discouraged.
(4) Parallel streets may be required along an existing or proposed major arterial thoroughfare to provide access to lots along such major arterial thoroughfares.
(5) Service drives shall be designed to provide only secondary access.
(c) Street Right-of-Way Widths and Grades and Standard Details. (Refer to Appendix H.)
Grades by Percent | |||
Classification | Minimum Right of Way Width (in feet) | Maximum | Minimum |
Major Arterial Thoroughfare | 100 | 5 | .6 |
Collector Streets | 30 | 7 | .5 |
Local Streets | |||
Rural Residentail | 60 | 8 | .5 |
Urban Single-Family | 60 | 8 | .5 |
Urban Multi-Family | 60 | 8 | .5 |
Light Industrial | 60 | 5 | .5 |
(d) Half Streets. Half streets shall be prohibited except where there is an existing half street adjacent to the subdivision in which case the remaining half of the street shall be platted.
(e) Cul-de-Sacs and Dead-End Streets. Streets designed to be permanently dead- ended shall not be longer than 600 feet and shall be provided at the closed end with a turnaround having an outside pavement diameter of at least 100 feet and a street property line diameter of at least 120 feet. If such a street is of a temporary nature and a future extension into adjacent land is anticipated then the turning circle beyond the normal street width shall be in the nature of an easement over the premises included in such turning circle, but beyond the boundaries of the street proper. Such easements shall be automatically vacated to abutting property owners, when the dead-end street is legally extended into adjacent land, if such dead-end street is legally extended into adjacent land. If such dead-end street extends only one lot depth past a street intersection, no turnaround shall be required. Subdivider shall be required to reserve for public use a strip of land five feet in width at the end of all dead-end streets. No person or persons shall have access across this property until an adjacent subdivision is developed and streets in such development are dedicated for public use. The cost of paving such five foot strip shall be borne by the subdivider connecting into such street.
(f) Corner Radii. Property lines at street intersections shall be rounded with a radius of not less than fifty feet for major arterial thoroughfares, thirty feet for collector and industrial streets and twenty feet for local streets. Chords or cutoffs may be permitted in places of rounded corners. Industrial park road right-of-way corner radius shall be sixty-five feet with fifty foot curb corner radius.
(g) Horizontal and Vertical Curves. Angles in the alignment of street lines shall be connected by a curve with a radius on the center line of not less than 286.48 feet for local, collector and industrial streets, and 572.96 feet for major arterial thoroughfares. Between reverse curves there shall be a tangent at least 100 feet long on major arterial thoroughfares. Every change in street grade shall be made with a vertical curve to provide distance suited to the location which in no case shall be less than 300 feet from a height of four and one-half feet.
(h) Intersections. Streets shall be laid out to intersect as nearly as possible at right angles and no street shall intersect any other street at an angle of less than sixty degrees. Three-way intersections are encouraged, but in no event shall an intersection containing streets in excess of four be approved.
(i) Street Jogs. Street jogs with centerline offsets of less than 125 feet shall be prohibited. If deemed necessary by the Planning Commission, the minimum distance between centerline offsets may be increased.
(Ord. 1981-99. Passed 8-24-81.)